阅读说明：本技术 一种型材热缩膜端部封口方法 (Method for sealing end of section bar thermal shrinkage film ) 是由 胡建德 于 2021-07-22 设计创作，主要内容包括：本发明公开了一种型材热缩膜端部封口方法,型材套设有热缩膜后不间断往前输送,前后相邻型材之间留有间距,并通过封口机构对前后相邻型材之间的热缩膜进行封口,封口时让封口机构随型材同速同向移动。本发明提供的型材热缩膜端部封口方法,封口时无需让型材停止,大幅节省包装时间,提高生产效率。(The invention discloses a method for sealing the end part of a section bar heat-shrinkable film, wherein the section bar is continuously conveyed forwards after being sleeved with the heat-shrinkable film, a space is reserved between the front and the rear adjacent section bars, the heat-shrinkable film between the front and the rear adjacent section bars is sealed by a sealing mechanism, and the sealing mechanism moves along with the section bar at the same speed and in the same direction during sealing. The method for sealing the end part of the section bar heat shrinkable film, provided by the invention, has the advantages that the section bar does not need to be stopped during sealing, the packaging time is greatly saved, and the production efficiency is improved.)

1. The utility model provides a section bar pyrocondensation membrane tip seals method which characterized in that, incessantly carry forward behind the section bar cover is equipped with the pyrocondensation membrane, leaves the interval between the adjacent section bar in front and back to seal the pyrocondensation membrane between the adjacent section bar in front and back through sealing the mechanism, let seal the mechanism and follow the section bar with the equidirectional removal at the same speed when sealing.

2. The profile heat shrink film end sealing method according to claim 1, wherein the sealing portion comprises two portions, namely a front profile heat shrink film rear end and a rear profile heat shrink film front end; the distance between the rear end of the heat shrinkable film close to the front section bar and the rear end of the front section bar is L1, the distance between the front end of the heat shrinkable film close to the rear section bar and the front end of the rear section bar is L2, and L1 is more than L2.

3. The method for sealing the end of the heat-shrinkable film of the profile as claimed in claim 2, wherein the L1 has a length reserved to enable the heat-shrinkable film outside the profile to shrink by heating and wrap the profile, and the rear end of the heat-shrinkable film is matched with the rear end of the profile in position; the reserved length of the L2 enables the heat-shrinkable film outside the section bar to be heated and shrunk and wrap the section bar, and the front end of the heat-shrinkable film is matched with the front end of the section bar in position.

4. A profile shrink film end closure method as in claim 2 wherein a cut is made between two of said closure portions of the shrink film.

Technical Field

The invention relates to the field of section bar packaging, in particular to a method for sealing the end part of a section bar heat-shrinkable film.

Background

After the surface of the section is subjected to acid-base cleaning and other treatments, in order to better protect the surface of the section and reduce the problem of scratches caused by collision, a heat-shrinkable film is coated on the surface of the section before packaging. The section bar is conveyed forwards after penetrating into the tubular heat shrinkable film, and the heat shrinkable film between the front and back adjacent section bars needs to be sealed for facilitating the subsequent heat shrinkage of the heat shrinkable film to wrap the section bar. However, in the process of sealing, the in-place section bar needs to stop moving, and then the sealing operation can be performed, otherwise, the sealing effect is poor. The profiles are transported again after sealing, which results in a slow and inefficient packaging of a large number of profiles. In addition, the position of sealing at present does not explain, and the cover has the section bar of pyrocondensation membrane when the higher region of temperature is passed forward to the back cover of sealing, the pyrocondensation membrane is heated and is shrunk gradually, can drag the not yet shrunk pyrocondensation membrane of rear side toward the front side during anterior shrink, this moment owing to seal the position random, lead to the pyrocondensation membrane still overlength after the shrink, or the pyrocondensation membrane after the shrink is too short and is broken by the section bar top, these two kinds of circumstances all cause pyrocondensation membrane parcel effect not good, produce the defective products.

Disclosure of Invention

The invention aims to provide a method for sealing the end part of a section bar heat-shrinkable film, which does not need to stop the section bar during sealing, greatly saves the packaging time and improves the production efficiency.

In order to achieve the purpose, the invention provides a method for sealing the end part of a section bar heat-shrinkable film, wherein the section bar is continuously conveyed forwards after being sleeved with the heat-shrinkable film, a space is reserved between the front and rear adjacent section bars, the heat-shrinkable film between the front and rear adjacent section bars is sealed by a sealing mechanism, and the sealing mechanism moves along with the section bar at the same speed and in the same direction during sealing.

As a further improvement of the invention, the sealing part comprises two parts, namely the rear end of the heat shrinkable film close to the front section bar and the front end of the heat shrinkable film close to the rear section bar; the distance between the rear end of the heat shrinkable film close to the front section bar and the rear end of the front section bar is L1, the distance between the front end of the heat shrinkable film close to the rear section bar and the front end of the rear section bar is L2, and L1 is more than L2.

As a further improvement of the invention, the reserved length of the L1 enables the heat-shrinkable film outside the profile to be heated and shrunk and wrap the profile, and the rear end of the heat-shrinkable film is matched with the rear end of the profile in position; the reserved length of the L2 enables the heat-shrinkable film outside the section bar to be heated and shrunk and wrap the section bar, and the front end of the heat-shrinkable film is matched with the front end of the section bar in position.

As a further development of the invention, a cut is made between the two portions of the seal of the heat-shrinkable film.

Advantageous effects

Compared with the prior art, the method for sealing the end part of the section bar heat shrinkable film has the advantages that:

1. seal the mechanism and set up on the closing device support to remove along with section bar direction of delivery through support actuating mechanism, then seal the relative section bar of mechanism static, seal the pyrocondensation membrane between the adjacent section bar around this moment, neither can damage the pyrocondensation membrane, seal effectually, need not moreover to let the section bar stop, save the packing time by a wide margin, improve production efficiency.

2. The two sealing structures are close to each other through the corresponding heating parts, and the thermal shrinkage film is locally heated, melted and adhered together, so that the sealing operation is realized, and the structure is simple. The cutting structure can cut off the thermal shrinkage film in the sealing process, so that the following thermal shrinkage film and the section bar are prevented from being dragged when the thermal shrinkage film in front is heated and shrunk, and the thermal shrinkage film is prevented from being dragged and deformed.

3. The support driving mechanism is in threaded connection with the sealing device support through the screw rod, and position control is more accurate.

4. The in-place time of the back section and the front section is respectively obtained through the first section position sensor and the second section position sensor, and meanwhile, the conveying speeds of the first section conveying mechanism and the second section conveying mechanism are adjusted through the controller, so that the conveying speeds of the front section and the rear section are basically consistent. The controller also controls the actions of the support driving mechanism and the sealing mechanism, so that the sealing mechanism can seal the heat-shrinkable film at the correct position, and when the sealed heat-shrinkable film is heated and shrunk, the front end and the rear end of the heat-shrinkable film are matched with the front end and the rear end of the section bar, so that the packaging effect is good.

5. First section bar conveying mechanism and second section bar conveying mechanism all include at least two and the cover have the section bar surface contact's of pyrocondensation membrane conveying roller, and the section bar is carried through the conveying roller and is difficult to skid, carries the position precision height.

6. The section bar and the pyrocondensation membrane after unreeling all pass section bar pyrocondensation membrane cover and establish the device, and section bar pyrocondensation membrane cover is established the device and is utilized two curb plates, roof, first bottom plate and second bottom plate to the guide effect of pyrocondensation membrane to can let the pyrocondensation membrane from the plane to be wound into the tube-shape gradually and wrap up in the section bar outside, need not artifical parcel, realizes automated production. When the thermal shrinkage film wound into a cylindrical shape passes through the thermal shrinkage film edge sealing structure, the thermal shrinkage film edge sealing structure enables the overlapped parts of the two side edges of the thermal shrinkage film to be attached together in an electrostatic or ultrasonic mode, so that the thermal shrinkage film is prevented from being unfolded again, and the subsequent processes of cutting the seal of the thermal shrinkage film, heat shrinkage and the like are facilitated.

7. The first hypotenuse guide part of curb plate, the second hypotenuse guide part of first bottom plate and the third hypotenuse guide part of second bottom plate can play the guide effect to pyrocondensation membrane, reduce the resistance simultaneously, prevent that pyrocondensation membrane from blocking or being lacerated.

The invention will become more apparent from the following description when taken in conjunction with the accompanying drawings, which illustrate embodiments of the invention.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Figure 1 is a front view of a section bar packaging line;

FIG. 2 is a front cross-sectional view of a profile heat shrink film end closure;

FIG. 3 is a side cross-sectional view of a profile heat shrink film end closure;

FIG. 4 is a schematic view of the location of the heat shrink film seal;

FIG. 5 is a front cross-sectional view of a profile heat shrink film heat shrink device;

FIG. 6 is a left side cross-sectional view of a profile heat shrink film heat shrink device;

FIG. 7 is an enlarged view of the air inlet duct and the heat generating structure;

FIG. 8 is a front view of the profile shrink wrap device;

FIG. 9 is a bottom view of the profile shrink wrap device;

FIG. 10 is a top view of the profile shrink wrap device;

fig. 11 is a left side view of the profile shrink film sleeving apparatus.

Detailed Description

Embodiments of the present invention will now be described with reference to the accompanying drawings.

Examples

Referring to fig. 1 to 11, a device for sealing an end of a heat shrinkable film of a profile comprises a sealing mechanism disposed on a sealing device support 51, and a first profile conveying mechanism 9 and a second profile conveying mechanism 10 are disposed on front and rear sides of the sealing mechanism, respectively. The closing device holder 51 is connected to a holder drive mechanism 54 for reciprocating the same in the direction of profile transport.

The sealing mechanism comprises two sealing structures 53 which are respectively arranged at the upper side and the lower side of the section bar conveying path. Each sealing structure 53 includes two heating members 533 which can be close to and away from the heat shrinkable film on the sectional material, in this embodiment, the heating members 533 are electric heating tubes. The two heating elements 533 on the two sealing structures 53 correspond to each other front and back along the conveying path of the section bar, and when the upper and lower electric heating tubes are close to each other and sandwich the heat-shrinkable film 62, the heat-shrinkable film 62 is locally heated, melted and adhered together, thereby realizing sealing.

The sealing structure 53 is further provided with a cutting structure 534, and the cutting structure 534 is located between the two heating members 533 of the same sealing structure 53. In this embodiment, the cutting structure 534 includes a blade and a cylinder or motor that drives the blade to reciprocate in a straight line.

In this embodiment, the sealing structure 53 further includes a rotating frame 531 and a rotating shaft 532, and the rotating frame 531 is rotatably connected to the sealing device support 51 through the rotating shaft 532. The heating member 533 is provided on the rotating frame 531. The heat generating members 533 of the upper and lower side sealing structures 53 are moved close to and away from each other by the rotation of the rotating frame 531. In addition, the sealing structure 53 may also use a linear lifting manner to move the heating element 533 closer to or away from the heat-shrinkable film 62.

The profile shrink film end closure further comprises a base 52. The holder driving mechanism 54 includes a screw 541 and a screw driving device 542 which are linked with each other. The screw 541 is connected to the base 52 and is screwed to the sealer mount 51. The base 52 is further connected with a slide rail 55, and the slide rail 55 is in sliding fit with the sealing device support 51.

The section bar heat shrinkable film end sealing device also comprises a controller. A first section bar position sensor 7 is arranged on one side of the first section bar conveying mechanism 9, and a second section bar position sensor 8 is arranged on one side of the second section bar conveying mechanism 10. The first section bar conveying mechanism 9, the first section bar position sensor 7, the second section bar conveying mechanism 10, the second section bar position sensor 8, the support driving mechanism 54 and the sealing mechanism are in signal connection with the controller. The first profile conveying mechanism 9 and the second profile conveying mechanism 10 both comprise at least two conveying rollers which are in surface contact with the profile sleeved with the heat-shrinkable film. The first profile position sensor 7 and the second profile position sensor 8 can be detected photoelectrically.

In this embodiment, the cross section of the profile 63 is square, and the conveying rollers are distributed on the upper and lower sides of the profile 63 and clamp the profile 63. The conveying roller adopts a rubber roller, and the sectional material is not easy to slip.

The method for sealing the end part of the section bar heat-shrinkable film comprises the following steps that the section bar 63 is sleeved with the heat-shrinkable film 62 and then is conveyed forwards uninterruptedly, a space is reserved between the front and the rear adjacent section bars 63, the heat-shrinkable film 62 between the front and the rear adjacent section bars 63 is sealed through a sealing mechanism, and the sealing mechanism moves along with the section bars 63 in the same speed and the same direction during sealing.

The sealing parts comprise two parts, namely the rear end of the heat shrinkable film close to the front section bar and the front end of the heat shrinkable film close to the rear section bar. The seals of the front and rear heat-shrinkable films are respectively formed by hot-pressing the heating members 533 corresponding to the upper and lower side sealing structures 53. The distance between the rear end of the heat shrinkable film close to the front section bar and the rear end of the front section bar is L1, the distance between the front end of the heat shrinkable film close to the rear section bar and the front end of the rear section bar is L2, and L1 is more than L2, as shown in FIG. 4.

The reserved length of L1 can make the thermal shrinkage film outside the section bar shrink by heating and wrap the section bar, and the rear end of the thermal shrinkage film is matched with the rear end of the section bar. Similarly, the reserved length of L2 can also make the heat-shrinkable film outside the section bar shrink by heating and wrap the section bar, and the front end of the heat-shrinkable film is matched with the front end of the section bar in position.

And when the seal is formed, the cutting structure 534 is used for cutting between two seal parts of the thermal shrinkage film.

The section bar heat shrinkable film end sealing device can be used independently and also can be used in a section bar packaging production line. As shown in fig. 1, a section packaging production line includes a section heat-shrinkable film end sealing device, and further includes a third section conveying mechanism at least disposed at one side of an input end or an output end of the section heat-shrinkable film end sealing device. In order to ensure the conveying accuracy, the third section conveying mechanism also adopts a conveying roller group.

The front side of the input end of the section bar thermal shrinkage film end sealing device is provided with a section bar thermal shrinkage film sleeving device 2. The front of the input end of the section bar thermal shrinkage film sleeving device 2 is provided with a thermal shrinkage film unwinding structure and a thermal shrinkage film guide roller 61 after the thermal shrinkage film 62 is unwound. The section bar heat shrinkable film sleeving device 2 comprises two side plates 21, a top plate 24, a first bottom plate 22 and a second bottom plate 23, and a second channel 29 is defined by the two side plates 21, the top plate 24, the first bottom plate 22 and the second bottom plate 23. The top plate 24 is connected between upper portions of the two side plates 21, and the first bottom plate 22 and the second bottom plate 23 are connected to lower portions of the two side plates 21, respectively. The first bottom plate 22 is located below the second bottom plate 23 with a gap 291 therebetween, and the gap 291 is in communication with the second channel 29. A thermal shrinkage film edge sealing structure 3 is arranged below the rear part of the section bar thermal shrinkage film sleeving device 2. The heat shrink film edge sealing structure 3 includes an electrostatic edge sealer or an ultrasonic welder. In this embodiment, the thermal shrinkage film edge sealing structure 3 is an electrostatic edge sealing device. The section bar heat shrinkable film sleeving device 2 further comprises an opening 26 and a section bar supporting part 28 which are sequentially arranged behind the first bottom plate 22 and the second bottom plate 23, and two sides of the section bar supporting part 28 are respectively connected with the bottoms of the two side plates 21. The heat shrink film edge sealing structure 3 is located below the opening 26 of the section heat shrink film sleeving device 2. The upper part of the top plate 24 of the section bar thermal shrinkage film sheathing device 2 is connected with a mounting frame 27.

The side plate 21 is provided with a first bevel guide 25 on the front side. The front sides of the first and second bottom plates 22 and 23 are provided with a second and third hypotenuse guide portions 221 and 231, respectively. The rear ends of the first hypotenuse guide portions 25 of the two side plates 21 are connected to the front ends of both the second hypotenuse guide portion 221 and the third hypotenuse guide portion 231, respectively. The front end edge of the top plate 24 is substantially flush with the front ends of the two first hypotenuse guides 25.

After the heat shrink film 62 passes the heat shrink film guide roller 61, the middle portion of the heat shrink film 62 extends into and through the second passage 29, and the middle portion of the heat shrink film 62 contacts the front end of the top plate 24. Two sides of the heat-shrinkable film 62 respectively bypass the first bevel edge guide portions 25 at the two sides at the inlet of the second channel 29 and are adhered to the outer side of the side plate 21 upwards, one side edge of the heat-shrinkable film 62 obliquely bypasses the lower edge of the side plate 21 downwards along the outer surface of the side plate 21 at the side, passes through the lower surface of the second bottom plate 23 and is positioned in the gap 291; the other edge of the heat shrinkable film 62 obliquely passes downward around the lower edge of the side plate 21 along the outer surface of the side plate 21 on the side, passes through the lower surface of the first bottom plate 22, passes around the side edge of the first bottom plate 22, and enters the gap 291 upward, and then overlaps with the other edge of the heat shrinkable film 62. The output end of the section bar thermal shrinkage film sleeving device 2 is provided with a conveying roller which can automatically rotate, and the section bar 63 and the thermal shrinkage film 62 sleeved on the outer side can be conveyed forwards together.

During the use, utilize the conveying roller of autonomic pivoted to be able to establish the pyrocondensation membrane 62 of device 2 department toward section bar 63 direction of delivery pulling that is located section bar pyrocondensation membrane cover, realize forming the tube-shape gradually in section bar pyrocondensation membrane cover device 2 department through pyrocondensation membrane 62 of pyrocondensation membrane guide roll 8 to the parcel is in the section bar 63 outside that passes from section bar pyrocondensation membrane cover device 2's second passageway 29. When pyrocondensation film 62 parcel is in the outside of section bar 63 after and through pyrocondensation film banding structure 3 top, pyrocondensation film banding structure 3 is through making the edge production static that pyrocondensation film 62 both sides overlapped and laminating together, prevents that pyrocondensation film 62 from scattering.

One side of the output end of the section bar thermal shrinkage film end sealing device is provided with a section bar thermal shrinkage film thermal shrinkage device 1. The section bar heat shrinkable film heat shrinking device 1 comprises a hot air nozzle 11 arranged outside a section bar conveying path. The hot air nozzle 11 can be single, and the hot air nozzle 11 can also be arranged into a strip-shaped annular nozzle; in addition, the hot air nozzles 11 may also be at least two and arranged around the profile conveying path, that is, each hot air nozzle 11 is annularly surrounded, so that an annular heated space where the cross section of the profile is located is uniformly heated, or the hot air nozzles 11 may also be spirally arranged around the profile conveying path. The hot air nozzles 11 spray hot air in a dotted manner, and in this embodiment, the hot air nozzles 11 are multiple and arranged around the profile conveying path. The hot air nozzles 11 are arranged in a plurality of rows along the conveying direction of the section bar, and each row is provided with 12 hot air nozzles 11 arranged around the conveying path of the section bar.

In this embodiment, the thermal shrinkage device 1 further comprises a pressure stabilizing box 12, and a channel 13 running through the two ends of the section conveying path is arranged in the middle of the pressure stabilizing box 12. The pressure stabilizing box body 12 is provided with a pressure stabilizing inner cavity 19 which is arranged around the outer side of the channel 13, and each hot air nozzle 11 is arranged on the inner wall of the channel 13 and is communicated with the pressure stabilizing inner cavity 19. The pressure stabilizing box body 12 is connected with an air inlet pipe 17. Besides this embodiment, each hot air nozzle 11 may be provided on a separate air jet device.

The number of the air inlet pipes 17 is two and the air inlet pipes are positioned at different positions of the pressure stabilizing box body 12, so that the hot air temperature of each area of the pressure stabilizing box body 12 is ensured to be consistent as much as possible, and in addition, more than two or one air inlet pipe 17 can be arranged according to the size of the pressure stabilizing box body 12. The air inlet pipe 17 is provided with a heating structure 18, and in this embodiment, the heating structure 18 includes an electric heating wire. The fan 14 is connected with the air inlet pipe 17 through the blast pipe 15, an electrical box 16 is arranged between the blast pipe 15 and the air inlet pipe 17, the electrical box 16 is electrically connected with the heating wire of the heating structure 18 to supply power for the heating wire, and simultaneously, the temperature of hot air is detected and controlled between 80 ℃ and 140 ℃. A box body bracket is connected below the pressure stabilizing box body 12, and the fan 14 is arranged on the pressure stabilizing box body 12.

The thermal shrinkage method of the section bar thermal shrinkage film comprises the following steps: the hot air nozzle 11 blows hot air to the surface of the heat shrinkable film sleeved on the outer side of the section bar, so that the heat shrinkable film 62 is heated to shrink and wrap the section bar 63. The length of the area of the hot air nozzle 11 blowing hot air toward the surface of the heat shrinkable film is shorter than the length of the profile 63. When hot air is blown to the surface of the heat shrinkable film by the hot air nozzle 11, the section and the hot air blowing area relatively move along the length direction of the section. The hot air blowing area is arranged around the section bar.

The distance between the hot air nozzle 11 and the section bar is less than 20 cm. The temperature of the hot air at the outlet of the hot air nozzle 11 is 80-140 ℃. The smaller the distance between the hot air nozzle 11 and the section bar 63 is, the less heat is dissipated between the hot air sprayed out and the contact of the heat shrinkable film 62, so that the energy is saved, and the temperature can be selected according to the moving speed of the section bar 63 and the heat shrinkage characteristic of the heat shrinkable film 62.

The air volume of the hot air blowing area is 50-400 cubic meters per hour. In the embodiment, the air volume is 210 cubic meters per hour, the requirement of shrinking the heat-shrinkable film of the section bar 63 with the section width of about 10cm can be met, the length of the pressure stabilizing box body 12 (the length of the hot air blowing area) is about 1m, and the distance between the hot air nozzle 11 and the section bar is about 10-15 cm. The relative movement speed of the section and the hot air blowing area is 5cm/s-50cm/s, and in the embodiment, the conveying speed of the section is controlled to be about 10 cm/s. In addition, the length of the hot air blowing area can be set within the range of 1cm-150cm according to the temperature of hot air and the heat required by shrinkage of the heat-shrinkable film.

Specifically, the cylindrical heat-shrinkable film 62 is first sleeved on the outer side of the profile 63, and then both are passed through the passage 13 of the surge tank body 12 at a relatively stable speed along the length direction of the profile 63. The hot air sprayed from the hot air nozzle 11 directly acts on the heat shrinkage film 62 to rapidly heat and shrink the heat shrinkage film 62, so that the heat shrinkage film 62 is tightly wrapped on the outer surface of the profile 63.

The present invention has been described in connection with the preferred embodiments, but the present invention is not limited to the embodiments disclosed above, and is intended to cover various modifications, equivalent combinations, which are made in accordance with the spirit of the present invention.